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A 82.5-kg man pushes a crate 7.5 m up along a ramp that makes an angle of 18.5° with the horizontal. He exerts a force of 510 N on the crate parallel to the ramp and moves it at a constant speed.
Calculate the work, in joules, that the man performs to cause the crate and himself to move up the ramp.
Sagot :
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